FDA permits the marketing of an e cigarette for the first time, paving the way for vaping products to be legally sold in the U.S. Roswell Park Comprehensive Cancer Center Buffalo, Are Electronic Cigarettes a Gateway to Tobacco Use? Sweet and Fruity E Cigarettes Thrive Despite Teen Vaping Crackdown WSJ How safe is vaping? UCLA The dangers of electronic cigarettes Article The United States Army Vaping just once raises oxidative stress levels in nonsmokers, increasing disease risk UCLA